CVE-2026-86095
Unidata netcdf-c through 4.10.1 Out-of-bounds Write via Oversized HDF5 Attribute Name
- State
- Published
- Severity
- 8.5 High
- Published
- Sep 4, 2026
- Updated
- Sep 8, 2026
- Reserved
- Sep 4, 2026
Description
Unidata netcdf-c through 4.10.1 contains an out-of-bounds write vulnerability in NC4_HDF5_inq_attname() that copies HDF5 attribute names into a fixed 256-byte buffer without length validation. Attackers can craft HDF5 files with oversized attribute names to overflow the destination buffer, causing memory corruption and crashes when applications enumerate attribute names.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.5 High | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
netcdf-cUnidata |
|
References
- https://github.com/Unidata/netcdf-cproduct
- NC4_HDF5_inq_attname() unbounded strcpy at v4.10.1technical-description
- VulnCheck Advisory: Unidata netcdf-c through 4.10.1 Out-of-bounds Write via Oversized HDF5 Attribute Namethird-party-advisory
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